Let a = {x | X be a positive integer less than 9}, B = {1,2,3} + C = {3,4,5,6}, find a ∩ B, a ∩ C, a ∩ (B ∪ C), a ∪ (B ∩ C)

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• 1. Let a = {x | X be a positive integer less than 9}, B = {1,2,3}, C = {3.4.5.6.}, find AUB, a ∩ C, a ∩ BUC, Au (B ∩ C)
• 2. Let a = {x | X be a positive integer less than 9}, B = {1,2,3}, C = {3,4,5,6}, find a ∩ B, a ∩ C, a ∩ (B ∪ C), a ∪ (B ∩ C)
• 3. For positive integers a, B, a △ B is equal to the sum of B consecutive positive integers starting from a, such as 2 △ 3 = 2 + 3 + 4 = 9, or 5 △ 4 = 5 + 6 + 7 + 8 = 26, if 1 △ χ = 15
• 4. Given that a, B, C and D are mutually unequal integers, and ABCD = 9, then the value of a + B + C + D is equal to () A. 0b. 4C. 8D
• 5. Decomposition factor: a4-2a2b2 + B4
• 6. If A.B.C is three sides of a triangle, then the value of A4 + B4 + c4-2a2b2-2b2c2-2a2c2 is a. positive B. negative C. positive or negative D. non negative
• 7. Group A: 1, 6, 7, 12, 13, 18 Group B: 2, 5, 8, 11, 14, 17 Group C: 3, 4, 9 Divide the natural numbers from 1 to 200 into ABC three groups. Group A: 1, 6, 7, 12, 13, 18 Group B: 2, 5, 8, 11, 14, 17 Group C: 3, 4, 9, 10, 15, 16 Please answer the questions according to the grouping rules. 1. There are () natural numbers in group B. 2. What is the 28th number in group A?
• 8. Divide the natural numbers 5 ~ 300 into three groups ABC a) 5 10 11 16 17 22.. b) 6 9 12 15 18 21.. C) 7 8 13 14 19 20.. ask how many numbers each group has Divide natural numbers 5 ~ 300 into three groups ABC a) 5 10 11 16 17 22.. b) 6 9 12 15 18 21.. C) 7 8 13 14 19 20.. how many numbers are there in each group?
• 9. Group A: 1, 6, 7, 12, 13, 18, 19 Group B: 2, 5, 8, 11, 14, 17, 20 Group C: 3, 4, 9, 10, 15, 16, 21 Then (1) in group B, there were two groups______ (2) the 600th number in group A is______ (3) 1000 is______ The third in the group______ The number of them
• 10. ABC three different natural numbers, and satisfy 1 / A + 1 / B + 1 / C = 5 / 6 To list
• 11. If a.b.c.d is an unequal integer and ABCD = 9, find the value of a + B + C + D Mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
• 12. Given that a, B, C and D are mutually unequal integers, and ABCD = 9, then the value of a + B + C + D is equal to () A. 0b. 4C. 8D
• 13. The values of integers a, B, C satisfying (8 / 25) ^ (- a) * (9 / 2) ^ (- b) * (5 / 3) ^ (- C) = 18
• 14. If a and B are positive integers, and 5A + 3B = 70, then the values of a and B satisfying the formula have () pairs. A.2. B.3. C.4. D.5
• 15. Let a = {x x is a positive integer less than 9}, B = {1,2,3}, C = {3,4,5,6}, then: 1, a intersection B = 2, a intersection C= 3. A-join (b-join C) = 4, a-join (b-join C)=
• 16. Design a graph, find the value of 1 + 3 + 5 + 7 + 9 +. + (2n-1), a is a positive integer, and use the graph to make the necessary explanation
• 17. What is the - 4 / 3 power of 16? Tell me how to calculate it
• 18. What is the power of - 2 of 0.25 + 2 / 3 of 8 - 1 / 16 - 0.75
• 19. How many times the power of 25 times the power of 2 of 5 is 625?
• 20. What is the 16th power of 25 multiplied by the 38th power of 2